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A student titrates 25.00 cm3 of hydrochloric acid with 28.60 cm3 sodium hydroxide solution of concentration 0.200 moles per dm3. The equation for the reaction is: HCl + NaOH to NaCl + H2O. Calculate the concentration of the hydrochloric acid.

From the equation given in the question we can see that one mole of hydrochloric acid (HCl) reacts with one mole of sodium hydroxide (NaOH). The first thing to do is to work out the number of moles of sodium...
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Answered by Hannah A. • Chemistry tutor
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You are given a square which you are told has a total area of 100 squared centimetres. You are also told that one side of the square has dimension 4(3x + 2), and the other has dimension 8x - y. What are the values of x and y?

The first thing to know is that a square has equal sides, and that the area of a square is length x length. Therefore in this case Length x length = 100 or Length 2 = 100 ans so Length = square root of 100 =...
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Answered by Hannah A. • Maths tutor
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Explain the role of JS Bach in the development of Equal Temprament

JS Bach's role in the development of Equal Temprament was vital. Equal Temprament is a type of tuning, which over time has become standardised on almost all instruments in Western Classical Music. Instead of...
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Answered by Maya C. • Music tutor
5551 Views

How do you conjugate regular verbs in the present tense?

ER, IR and AR are the three different endings of Spanish verbs. IR and ER verbs are conjugated in a similar way, and AR verbs in a different way in the present tense. With all regular verbs you knock off the...
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How do humans regulate their body temperature?

The hypothalamus in the brain controls the body temperature. If the temperature gets too high: receptors in the hypothalamus detect the change. the heat loss centre is stimulated causing 3 things: vasodialat...
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Answered by Ollie H. • Biology tutor
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